suspend broken when disconnecting an usb audio device

[Hans Petter Selasky]

On 10/16/15 16:09, account lost wrote:
> Hi, I'm using FreeBSD 10.2-RELEASE-p5 amd64 on a thinkpad t430.
>
> I have suspend and resume functionality working by using newcons and i915kms.ko as the video driver, but whenever I plug in and use my usb DAC, either by choosing it in applications supporting OSS or by setting it as the hw.snd.default_unit and then disconnect it without terminating the audio applications, I can't enter acpi s3.
>
> When trying to suspend the system I get repeated messages on the console: "Waiting for sound application to exit!" (as documented here: http://baitisj.blogspot.it/2015/05/usb-audio-disconnect-woes-in-freebsd.html) but I can't react by killing the incriminated pid since ttys are already unavailable, and I'm forced to perform an hard reset

Hi,

There is a bug in pulseaudio or some mixer application, that it doesn't 
close the /dev/mixer or /dev/dsp, when receiving a read/write error from 
the USB audio device.

Try killing pulseaudio.

--HPS